Top-down tuning of nanosized ZSM-5 zeolite catalyst by bead milling and recrystallization

Wakihara T.; Ihara A.; Inagaki S.Tatami J.Sato K.Komeya K.Meguro T.Kubota Y.Nakahira A.

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Top-down tuning of nanosized ZSM-5 zeolite catalyst by bead milling and recrystallization

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Zeolites with high external surface area allow diffusing reactants greater access to catalytically active sites, which has led to interest in the preparation of nanosized zeolites. In this study, a top-down approach has been used for zeolite synthesis by first milling the zeolite to produce nano-particles. This technique destroys the outer portion of the zeolite framework, causing a significant decrease in its catalytic activity. To remedy this, the damaged part was recrystallized using a dilute silicate solution after bead milling. The combined bead milling and postmilling recrystallization yielded nano ZSM-5 (MFI type zeolite), approximately 60 nm in size, with high crystallinity, and the zeolite powder showed a higher catalytic activity in cumene cracking in comparison with the raw ZSM-5 zeolite. Furthermore, the decrease in crystal size suppresses catalyst deactivation through coke deposition during cumene cracking.

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《Crystal growth & design》 |2011年第11期|5153-5158|共6页
作者
Wakihara T.; Ihara A.; Inagaki S.Tatami J.Sato K.Komeya K.Meguro T.Kubota Y.Nakahira A.;
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Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan;

Division of Materials Science and Chemical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan;

Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuencho, Naka-ku, Sakai, Osaka 599-8531, Japan;

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中图分类晶体学;
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Top-down tuning of nanosized ZSM-5 zeolite catalyst by bead milling and recrystallization

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